Earth is the only planet that has a and a

Earth is the only planet that has a hydrosphere and a biosphere.

Explanation:

Earth has two main important factor namely biosphere and hydrosphere. The earth has different spheres which makes the planet to be able to support life and generate viable conditions.

Out of all the spheres Earth has, the most significant is hydrosphere as it is sole responsible sphere for the later on development of biosphere as per the evolutionary theory. Rest of the sphere can be found on other planets too but these two are not present on any other planets together.

v=ir = 3x15 =45 v